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22 | 4 | :baby_chick: A tiny C language compiler (x86-64) (WIP) 5 |
6 | 7 | 23 | 24 | ## Build 25 | 26 | ```sh 27 | $ stack build 28 | $ stack build --fast # no optimized 29 | ``` 30 | 31 | ## Usage 32 | 33 | ```sh 34 | $ stack exec htcc -- -h 35 | Usage: htcc [--visualize-ast] [--img-resolution RESOLUTION] file [-o|--out file] 36 | [-w|--supress-warns] 37 | 38 | Available options: 39 | -h,--help Show this help text 40 | --visualize-ast Visualize an AST built from source code 41 | --img-resolution RESOLUTION 42 | Specify the resolution of the AST graph to be 43 | generated (default: 640x480) 44 | file Specify the input file name 45 | -o,--out file Specify the output destination file name, supported 46 | only svg (default: ./out.svg) 47 | -w,--supress-warns Disable all warning messages 48 | ``` 49 | 50 | Simple compilation: 51 | 52 | ```sh 53 | $ echo 'int printf(); int main() { printf("hello world!\n"); }' > t.c 54 | $ stack exec htcc -- t.c > t.s 55 | $ gcc -no-pie t.s -o out 56 | ``` 57 | 58 | For one liner: 59 | 60 | ```sh 61 | $ echo 'int printf(); int main() { printf("hello world!\n"); }' | stack exec htcc -- /dev/stdin | gcc -xassembler -no-pie -o out - 62 | ``` 63 | 64 | ## AST diagram generation 65 | 66 | htcc has the ability to visualize ASTs built from loaded C code. 67 | This option allows to specify the resolution and output file. 68 | Examples are shown in the following table. 69 | 70 || Command | 73 |Output | 74 |
|---|---|
$ echo 'int main() { return 1 * 2 + 4; }' |\
77 | stack exec htcc -- /dev/stdin --visualize-ast |
78 |  |
79 |
$ echo 'int printf();
82 | void fizzbuzz(int n) {
83 | for (int i = 1; i < n; ++i) {
84 | if (!(i % 15)) printf("fizzbuzz\n");
85 | else if (!(i % 3)) printf("fizz\n");
86 | else if (!(i % 5)) printf("buzz\n");
87 | else printf("%d\n", i);
88 | }
89 | }
90 | int main() { fizzbuzz(50); }' |\
91 | stack exec htcc -- /dev/stdin\
92 | --visualize-ast\
93 | --img-resolution 1280x720\
94 | --out fizzbuzz.svg |
95 |  |
96 |
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